I have similar problem and I know what can be the source. So, there's no problem with the new or any version of opera. The problem with outlook.com. I can't select any mail or delete, move them. I can only read them, nothing else.
And here is the magic. I have 2 accounts. One of them is an old @live.com and the second is a new @outlook.com. Everything is fine with the @live.com but there are the problems - what I've mentioned above and what waynesgurl2 has - with @outlook.com.
When I log into @live.com I can see in the url bar: https://dub126.mail.live.com
and when I log into @outlook.com I can see this: https://bay181.mail.live.com
I've got the problems first time abut 2-3 weeks ago, before that everything was fine with @outlook.com. I don't remember, microsoft changed the url or something in the code of the webpage, but still everything fine with @live.com but problems with @outlook.com.
I hope somebody (opera or microsoft) can solve the problem.